A deck of playing cards can be super handy in the shop. Below are a few uses.
#1: Use As Shims
Add shims under tools to make micro-adjustments to any desired height
#2: Use As Perfect Spacers
When laying out drawers, you can put cards in between sides and bottoms to find the exact distance between them.
#3: Use For Exact Measurements
When needing to measure a small gap, insert playing cards into the crevice and then transfer to the setup. No tape measure required.